Drawworks



April 21, 1936.

D. W. WALTERS DRAVY'WORKS Filed sept. 13, 1935 5 sheets-sheet' l April 21, 1936. 'D W WALTERS 2,038,149

DRAWWORKS Filed Sept. l5, 1933 5 Sheets-Sheet 2 Gum/MM35 April 2l, 1936. n D Wl WALTERS 2,038,149

DRAWWORKS Filed Sept. l5, 1953 5 Sheets-Sheet 3 April 21, 1.936.

muil" I D- W. WALTERS DRAwwORKs Filed Sept. 13, 1933 5 Sheets-Sheet 4 l Z O I o o i I o y f3 j O 417 w I O f O s O O I O O O D. w. wALTERs 2,038,149

DRAWWORKS April 2l, 1936.

Filed Sept. 13, 1953 5 Sheets-Sheet 5 Patented Apr'.l 21, 1936 UNITED STATES PATENT oFFicE signor, by mesne assignments, to'The National Superiorv Company, Toledo, Ohio, a corporation of Delaware 'Application september 13, 193s, serial No. `689,232.

1,2 chime. (c1. s- 19) This invention relates to rotary ldrawworks, and

more particularly to a rotary drawworks vas utilized in the rotary4 process of drilling oil, gas or water wells.

An object of this invention is to provide a rotary drawworks applicable for use in a drilling rig as utilized for carrying out the rotary process of drilling wells; the prime mover for which drill-l ing rig is a uni-directional means such.lfor example, as a gas engine or an internal combustion engine which may be of the Diesel type.

Another object of this invention is to provide a rotary drawworks in which their is provided a new and novel type of drive to a member mounted'on the drumshaft of the drawworks, which member can be engaged to drive eitherthe hoisting drum or the rotary machine or both. t

Another object of this invention is a rotary drawworks which is particularly applic'able for use in connection with an internal combustioxengine drive, which drawworks includes a shaft driven from the internal combustion engine in a single direction., a drawworks or hoisting drum, and a rotary machine drive means and a transmission connecting means between the driven shaft and the drawworks drumshaft providing for the driving of the drawworks drumshaft or a,l rotary drive sprock t in either direction as desired from the uni 'rcctional internal combustion engine.

Another object of this invention is to provide a self-contained" drawworks unit which can be readily transported in the field.

Another obiect of this invention isto provide a drawworks in which forward and reverse transmission` means are provided in order to vadapt the drawworks to an engine drive of the non-reversing type.

Other objects and advantages of this' invention it is believed will be apparent Afrom the following detailed 4description of a preferred embodiment thereof as illustrated in the accompanying drawings.

' In the drawings:

-Figure 1l is a diagrammatic plan view of a rotary well drilling rig in which there is adapted a rotary drawworks and drivemeans embodying my invention. l

Figure 2 is a side elevation .of the drilling rig.

Figure 3 is a front elevation partly in vertical section of the rotary drawworks embodying `my invention.

Figure 4 is a rear elevation partly in vertical section of the rotary drawworks embodying my invention. f

to provide Figure 5 is works. y y

Figure 6 isv a fragmental pian. view partly in a side elevation'oi.'V the rotary draw- .section illustrating the assembly ofthe clutch operating .foot levers.

Figure 7 is a rear elevation partly. in vertical mid-section of the modified form of theydrawworks embodying my invention.

In the preferred embodiment of my invention as illustrated in the accompanying drawings there is illustrated a uni-directional prime mover or internal,l combustion engine A, a drawworks B, driven A{from the prime mover A by a multiple belt- .transmission C. A' rotary machine D is driven from the drawworks B by means of a chain transmission A chain transmission F4 is likewise provided for driving other auxiliary units employed in. the rotary process of drilling .the well such, for example, as for driving the hailing drum fitting within pipe spacers t to maintain the end frames in alignment. 4

Thejack shaft 31s driven from the uni-directional prime mover A, the drive being to a pulley III which issecured to one end of the :lack shaft 3` and is driven by the multiple belt type of transmission as indicated at C. Rotatably mounted upon the jack shaft 3 is a drive sleeve Il supported by bearings I2. Mounted on the sleeve II is a forward friction clutch mechanism I3 and a reverse clutch mechanism Il. The friction clutch I3 may be of any suitable or desirable form and as herein` illustrated consists of a housing I5 secured to the sleeve II, and a spider I6 keyed to .the shaft 3. The spider I6 has internally expanding clutch shoes I1 which are operable by means of a shifting collar I8 to frictionally connect the shaft 3 with the sleeve.V II for a direct drive. The drive clutch collar I3 isactuated by means of a. suitable shifter I8 which is under the operator's control through a connecting rod 20,' rock shaft .2I; and actuating lever 22.

'I'he reverse clutch mechanism Il is preferably ofthe following construction and' includes a "spider 23 journaled on the shaft 3 andhaving radially disposed pinions 24 meshing with a bevel gear 25andasimilarbevelgear26keyedtothe shaft 3.

The bevel gear 25 is secured to the sleeve II. The outer periphery of the spider 23 is formed to define a brake rim surface 21 around which is fitted a brake band 28. The brake band 28 is anchored to thecross beam 28 as indicated at 36. The live end of the brake band 28 is operably connected to the rock shaft 2I so as to obtain a coordinated control for the direct clutch I3 and the reverse clutch I4 through the single operating lever 22. The operating range of the lever 22 is such as to include a forward position when the clutch I3 is engaged and the band 28 is released and a reverse position when the clutch I3 is released and the reverse. band .28 is engaged to hold the spider 23 stationam f With the spider 23 heid stationary, the drive sleeve II is-jdriven in a direction opposite to the shaft 3 through the bevel gear 26, statipnary pinion 24'and bevel gear 2l mounted onthe sleeve II. The operating lever 22 has a notch segment 3I which'cooperates with a spring member 32 to retain-..talever 22 and its associated mechanism inthe forward. reverse and neutral positions as desired Meansare provided for driving the line shaft 2.frorirthe`-jack shaft 3, which means are herein illustrated as including a pair of sprockets 33v and 34',which are journaled on the sleeve I I. Spiined 4'on'the sleeve II between the sprockets 33 and 34 isa double faced clutch collar 3.5 which is adapted to be selectively shifted into driving engagement with the clutch faces 36 Qr31 of the sprockets 33 and 34 respectively by means vof ,a clutch shifter 38. The clutch shifter 38 is pivtally supported by a bracket 39 from.l the frame 5 and is connected by means` of a rod 40 with an operating lever 4I which is journaled upon the rock shaft A 2 I. A latch bar 4241s connected with the lever 4I and is provided withthree notches 43 to insure retaining Ythe clutch`l'35in one of its two operating positions or in its neutral position. Mounted on the end of the jack shaft 3 is a sprocket 44 which is provided to drive auxiliary units of the drilling -rlg such, for example, as the bailing drum G or'the slush pump H. If desired a clutch may be interposed between the sprocket 44 and the shaft 3 to releasablyconnect the sprocket 44 with the shaft as' desired. y

'I'he line shaft 2 is provided with sprockets 4 and 46 which are keyed or otherwise secured to the line shaft 2 and are driven by means of suitable transmission chains 41 and 48 from the sprockets 33 and 34 of the jack shaft. In the construction as thus provided it is possible t drive the line shaft 2 with two speeds forward or two speeds in reverse by means of the non-reversible prime mover A. Furthermore, -it is to be observed that the drive to the drum G or pump H is unaffected by the direction of drive of the line shaft 2.

Mounted upon the ends of the line shaft 2 are catheads 48 for use in operating pipe tongs and lifting equipment around the derrick in a manner well known to those skilled in the art. Means are provided for driving the drum shaft I from the line shaft 2 which means preferably include sprockets 58 and 5I over which chains 52 and 53 are trained and which chains are trained over sprockets 54 and 65 journaled upon the drum shaft I. Secured to the drum shaft I is a drum 56 which may be-of any suitable or desirable oonstruction well known to those skilled in theart. The sprockets 54 and 66 are provided with clutches 51 and 58 for selectively engaging the drives provided from the line shaft 2- to the drum shaft I. 'Ihe clutch 51 is termed a oneway clutch and the clutch 58 is a two-way clutch.

In the construction thus provided it will be observed that the drum 56 can be driven at four forward speeds and at two reverse speeds for any given speed of the uni-directional prime mover A. The clutches 51 and 58 are operated by foot levers 58 and 60 through Shifters 6I and 62, respectively.

Secured to the end flanges of the drum 56 are brake rims 63. Mountedupon the brake rims 63 are brake bands 64, the `live ends o f which brake bands are operated by means of a rock shaft 65 connected to a brake lever 66 situated ina plane at right angles to the plane of the brake rims. Means are provided on the drum shaft for driving the rotary machine D through the chain transmission E, which means preferably includes a sprocket 61 which is journaled upon a sleeve 68, which sleeve 68 is in turn journaled on the drum shaft I. The sprocket 61 is provided with a clutch face 69 and the sprocket 55 is provided with acomplementary clutch face 10. When the rotary machine D is inoperative, the drive sprocket 61 is in the position as illustrated in Figure 3.

A shifter 1I is provided for shifting the sprocket 61 to the left as viewed in Figure 3 so that the clutch faces 69 and 10 are engaged. The shifter 1I is connected by means of a rod 12 with the foot pedal 13. y

As the. sprocket 55 is driven at two speeds forward or reverse it is possible to have the same number of speeds and directions of drive for the rotary sprocket 61 and hence for the rotary machine D. When the sprocket 61 is in the inoperative position, the plane of the sprocket teeth thereon is slightly out of alignment with the sprocket on the rotary machine D, but by shifting the sprocket 61 into driving engagement with the sprocket 55, the planes of the sprocket 61 and the'sprocket on the rotary machine D come into alignment with the result that there is no misalignment of the transmission chain when driving.

In Figure '7 I have illustrated a modified form of jack shaft drive of the drawworks in which the jack shaft 3a is driven at a forward and reverse direction from the driv sprocket I Ila rotatably mounted thereon. The -structure illustrated in Figure 7 is similar to that as heretofore described so that similar numerals have been employed with the addition of a suffix a.

Rotatablymo'unted on the jack shaft 3a is the drive sprocket Ilia which is driven from any suitable form of uni-directional prime mover. The sprocket Ilia is positioned between the forward clutch I 3a and the reverse clutch 'I4a.

The clutchI I3a consists of a housing I5a connected to the sprocket Illa and a. spider I6a having internally expanding clutch shoes I1a which are operable by means of the shifting collar I 9a to frictionally connect the drive sprocket Ilia with the shaft 3a.

'Ihe forward clutch collar I 8a is actuated in the same manner as that described for the clutch mechanism I3 as illustrated in Figure 4. The reverse clutch mechanism I4a includes a spider 23a having bevel pinions 24a-meshing with a bevel gear 25a non-rotatably mounted with relation to the sprocket Illa and a bevel gear 26a which is keyed to the shaft 3a. The outer periphery of the spider defines a brake rim surface. 21a around which is fitted a brake band 28a which is also anchored and operated in the same manner as described inv connection with the reverse clutch in Figure 4.

Journaled on the jack shaft 3a are line shaft drivezsprockets 33a and 34a between which is positioned the double faced clutch collar 35a whichcan be operated to selectively engage either sprocket to drivethe line shaft 2 at the desired speed. Sprocket a is mounted upon the end of thejack shafta. for driving any auxiliary unit of the derrick rig.

Having fully described my invention, it is to be understood that I do not wish to be limited to the details herein vset forth, but my invention is of the full scope of the appended claims.

I claim:

' 1. In a rotary drawworks, the combination of a frame, a line shaft rotatably supported by the frame, a jack shaft rotatably supported bythe frame, a drum shaft rotatably supported by the frame, a power take-off drive sprocket'rotatably supported on said drum shaft, means to selectively drive the drive sprocket and the drum shaft from the line shaft, a drumsupported on said drum shaft and non-rotatably secured relative thereto, means for driving the line `shaft from the jack shaft in one direction, means for driving the line shaft from the jack shaft in a reverse direction, said driving means for driving the line shaft in a forward and reverse direction, including a transmission means between said line and jack shafts which is common to the forward and reverse drive means, and means of driven sprockets rotatably mounted on the` drum shaft, transmission drive connections between the driven sprockets, line shaft and jack shaft for driving the driven sprockets at a plurality of speeds in one direction, transmission drive connections between one yof said driven sprockets, line shaft and jack shaft for driving said driven sprocket in the reverse direction, said transmission drive connections for driving said driven sprocket in a forward and reverse direction including a transmission connection between the line shaft and the jack shaft which is common to the forward and reverse drive connections, clutch means to selectively engage said driven 4sprockets in driving relation with said drum shaft, means including a clutch connection to connect one of said driven sprockets in driving relation with the power take-off drive sprocket, and a uni-directional prime mover for driving the jack shaft.

3. In a rotary drawworks, the combination of a frame, a drum shaft rotatably supported by the frame, a line shaft, rotatably supported by the frame, a jack shaft rotatably supported by the frame, a drum mounted on the drum shaft to be driven therewith, a power take-off sprocket rotatably supported on the drum shaft, transmission drive connections between the drum shaft, line shaftand jack shaft for driving the drum at a plurality of speeds in one direction, transmission drive connections between the drum shaft, line shaft and jack shaft for driving the drum in the reverse direction, transmission drive connections between the power take-off drive sprocket; line shaft and jack shaft for driving the power take-off drive sprocket at a plurality of speeds in one direction, transmission drive con- .nectlon's between the power take-off drive sprocket, line shaft and jack shaft for driving the power take-off drive sprocketl in the reverse `iirec'- tion, said transmission drive connections for drivably mounted on said jack shaft, a forward clutch positioned at the end of the sleeve adapted to connect the jack shaft and the sleeve for driving the latter in a forward direction, a reverse clutch positioned at the other end of the sleeve adapted to connect the jack shaft and the sleeve for driving the latter in a reverse direction, coordinated operating means to selectively engage either clutch, a uni-directional drive means on the jack shaft, a plurality of drive means rotatably mounted on the sleeve, transmission connections between'said latter drive means and the drum shaft for driving said drum, and clutch means on said sleeve to selectively engage any of the drive means thereon to drive the drum at a purality of forward or reverse speeds.

5. In a drawworks, the combination ofalframe, a drive shaft rotatably supported on the frame, means to drive the .drive shaft, a drum shaft carrying a spooling drum being rotatably supported on said frame, a clutch faced sprocket having a sleeve extension rotatably mounted on the drum shaft, a sprocket mounted on the drive shaft for driving the sprocket on the drum shaft, a clutch slidably mounted on the drum shaft to engage one of the clutch faces on the sprocket to drive the drum shaft as desired, a clutch faced sprocket rotatably and slidably mounted on the sleeve extension of the first named clutch faced sprocket, means to shift one of the clutch faced sprockets axially to engage the complementary clutch faces to effect a driving connection, and a transmission connection from the second named clutch faced sprocket to an auxiliary driven member.

6. In a device of the class described, the combination of a drum shaft, a drum mounted on the drum shaft, a frame including spaced members for rotatably supporting the drum shaft, the drum having an outwardly extending brake rim at one end, a sprocket and clutch drive means mounted on the drum shaft partially within the space defined by said outwardly extending brake rim for driving the drum, a power take-off sprocket mounted on the drum shaft between the first said sprocket and the supporting member, and clutch means for clutching the latter said sprocketsto rim, means to shift said clutch into driving engagement with said clutch faced driven sprocket, a clutch faced power take-off sprocket rotatably and slidably mounted on said sleeve extension between said driven sprocket and the adjacent shaft supporting member, and means to shift said power take-ofi sprocket axially into driving engagement with said clutch faced driven sprocket.

8. In a. drawworks, the combination of spaced bearing supports, a drum shaft carrying a spooling drum being rotatably supported on said supports, a drive shaft rotatably supported on said supports, means to drive said drive shaft, a transmission member on the drive shaft, a transmission member on the drum shaft operatively connected with the drive shaft transmission member, clutch means to engage with the transmission member on the drum shaft to drive the drum, a rotary machine drive member rotatably supported in co-axial relation to the drum shaft transmission member, vand means to shiftv the rotary machine drive member axially into driving engagement with the transmission member on said d rum shaft.

9. In a drawworks, the combination of a frame, a ldrive shaft rotatably supported on the frame, adrum shaft assembly including a shaft, a spooling drum mounted thereon, a drive sprocket rotatably supported on the drumv shaft, clutch means to selectively engage said drive sprocket to drive the spooling drum, a rotary machine drive sprocket, said drive sprocket and rotary machine drive sprocket being provided with complementary clutch meansI to form a driving connection, means to shift said rotary machine drive sprocket axially out of driving engagement with the drive sprocket, means to drive said drive shaft, and a sprocket on said drive shaft for driving the first named drive sprocket on the drum shaft.

10. In a drawworks, the combination of a drum shaft, a jack shaft, means to support said shafts, a drum mounted on the drum shaft, a sleeve rotatably mounted on the jack shaft, a releasable forward clutch positioned at one end of the sleeve adapted to connect the jack shaft and the sleeve for driving the latter in a forward direction, a releasavble reverse clutch positioned at the other end of the sleeve adapted to connect the Jack shaft and the sleeve for driving the latter in a reverse direction, coordinated loperating means to selectively engage either clutch, a pair of drive means rotatably mounted on the sleeve, transmission connections between said latter drive means and the drum shaft for driving said drum,

a clutch positioned on said s1eeve between sindv drive means, and means to shift said clutch to engage either of said drive means to provide a drive connection between said sleeve and either of said drive means for driving the drum in either a forward or reverse direction.

11. In a drawworks, the combination of a drum shaft, a Jack shaft, means to support said shafts, a drum mounted on the drum shaft, a sleeve rotatably mounted on the jack shaft, means to drive said sleeve from a uni-directional source of power, a releasable forward clutch means interposed between one end of said sleeve and said Jack shaft for driving said shaft in a forward direction, a releasable reverse clutch means interposed between the other end ofsaid sleeve and said jack shaft for driving said shaft-in a reverse direction, operating means to selectively engage either of said clutch means for driving the jack shaft in either direction, and transmission connections between the jack shaft and the drum shaft for driving said drum.

v 12. In a drawworks, the combination of a drum shaft, a jack shaft, a line shaft, means to support said shafts, a drum mounted on the drum. shaft, a sleeve rotatably mounted on the jack shaft, means to drive said sleeve from a unidirectional source of power, a vreleasable forward clutch means interposed between one end of the sleeve and said jack shaft for driving'said shaft in a forward direction, a releasable reverse clutch means interposed between the other. end of said sleeve and said jack shaft for driving said shaft in a reverse direction, transmission connections between the jack shaft and the line shaft and between the line shaft and the drum shaft for driving the lattershaft at a plurality of 

